Many CAD companies produced CAD software in the 1970's - present. Some of them are listed below. The list is far from complete or representative: The CAD business landscape is very dynamic: almost every month new companies appear, old companies go out of business, companies split and merge. Sometimes some names disappear and reappear again.
- Autodesk
- Bentley Systems
- CADDS5
- Cadkey
- CATIA
- EDS
- Euclid
- I-DEAS
- Inventor
- Intergraph
- Matricus
- ME
- Pro/ENGINEER
- QCad free software
- Solid Edge
- Solid Works
- Think3
- Unigraphics
- VariCAD
- Vectorworks
- AutoCAD (by Autodesk)
- Caddie
- Microstation (by Bentley Systems)
- Avanti (merged into Synopsys)
- Cadence Design Systems, Inc
- IC-Ed
- Mentor Graphics
- MyCad
- Stabie-Soft
- Silvaco
- Synopsys
- Tanner Research